We expect the cameras to get wet. In car wash bays or tunnels, there is really no way to avoid this. We also expect them to be able to put up with some abuse from customers as well. We manufacture a lot of our cameras to watertight standards, and are tested in our “dunk tank” immersed to a depth of 3 feet for 24 hours. We also shoot the camera bodies with nitrogen prior to sealing, to displace any existing moisture that may be present. Some models of cameras also have desiccant packs inserted to help maintain lowmoisture levels.